Finn, son of Folcwald, was a legendary Frisian lord. He is mentioned in Historia Britonum, in Beowulf, and in the Finnsburg Fragment.

He was married to Hildeburh, a sister of the Danish lord Hnæf, and was killed in a fight with Hnæf's lieutenant Hengest after Hnæf was himself killed by Frisians.

Here we reproduce a passage from Beowulf as translated by Seamus Heaney (lines 1089–1090):

Finn, son of Folcwald,

should honor the Danes,

English heroic legends | Frisia